The Swift Discovery of X-Ray Afterglows Accompanying Short Bursts from SGR 1900+14

2008/05/31 by Y. E. Nakagawa, T. Sakamoto, G. Sato +3 · 3 citations
Physics and Astronomy · #Afterglow #Astrophysical Phenomena and Observations #Bolometer #Gamma-ray burst #Gamma-ray bursts and supernovae #Light curve #Luminosity #Power law #Pulsars and Gravitational Waves Research #astro-ph

paper · pdf · doi:10.1086/590428

published in The Astrophysical Journal 681(2), L89-L92 (IOP Publishing) · 12 pages, 3 figures, 3 tables, accepted for publication in ApJL

arxiv created 2008/05/31 · openalex publication_date 2008/06/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The discovery of X-ray afterglows accompanying two short bursts from SGR 1900+14 is presented. The afterglow luminosities at the end of each observation are lower by 30%-50% than their initial luminosities, and decay with power-law indices p ∼ 0.2–0.4. Their initial bolometric luminosities are L ∼ 10 34 -10 35 erg s −1 . We discuss analogies and differences between the X-ray afterglows of SGR short bursts and short gamma-ray bursts.

Citations

• Magnetar giant flares and afterglows as relativistic magnetized explosions
• The Swift X-Ray Telescope
• The FirstXMM‐NewtonObservations of the Soft Gamma‐Ray Repeater SGR 1900+14
• Magnetars: structure and evolution from p-star models
• The 2001 April Burst Activation of SGR 1900+14: X-Ray Afterglow Emission
• An Extended Burst Tail from SGR 1900+14 with a Thermal X‐Ray Spectrum